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WHAT IS IT

NKENN on Wed July 22, 2009 7:34 AM User is offlineView users profile

Year: 2001
Make: FORD
Model: EXCURSION
Engine Size: 5.4L
Refrigerant Type: R134A
Ambient Temp: 87
Pressure Low: 50
Pressure High: 200
Country of Origin: United States

Just replaced the TXV on the auxiliary (rear A/C) unit. The low pressure lines are wrapped with a black "tar like" material which I partially removed to get the TXV disconnected. Now that my rear system is functioning properly, there is quite a bit of condensation building up on the lines and dripping onto the floor of the equipment compartment. Does anyone know what that black "tar like" material is and where I can get some?
THANKS!

GM Tech on Wed July 22, 2009 8:38 AM User is offline

Its called "cork insulation tape" but we always called it "dum-dum" at work......

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

NKENN on Wed July 22, 2009 9:48 AM User is offlineView users profile

Thanks for the speedy reply. I have located some at an A/C Supply House less than a mile away. THANKS AGAIN!

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